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nilfs2: record used amount of each checkpoint in checkpoint list

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This records the number of used blocks per checkpoint in each
checkpoint entry of cpfile.  Even though userland tools can get the
block count via nilfs_get_cpinfo ioctl, it was not updated by the
nilfs2 kernel code.  This fixes the issue and makes it available for
userland tools to calculate used amount per checkpoint.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: Jiro SEKIBA <jir@unicus.jp>
This commit is contained in:
Ryusuke Konishi
2011-03-05 00:19:32 +09:00
parent ae191838b0
commit be667377a8
7 changed files with 29 additions and 21 deletions
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fs/nilfs2/inode.c
+18
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@@ -41,6 +41,24 @@ struct nilfs_iget_args {
int for_gc;
};
void nilfs_inode_add_blocks(struct inode *inode, int n)
{
struct nilfs_root *root = NILFS_I(inode)->i_root;
inode_add_bytes(inode, (1 << inode->i_blkbits) * n);
if (root)
atomic_add(n, &root->blocks_count);
}
void nilfs_inode_sub_blocks(struct inode *inode, int n)
{
struct nilfs_root *root = NILFS_I(inode)->i_root;
inode_sub_bytes(inode, (1 << inode->i_blkbits) * n);
if (root)
atomic_sub(n, &root->blocks_count);
}
/**
* nilfs_get_block() - get a file block on the filesystem (callback function)
* @inode - inode struct of the target file